Improved cabinet-ventilator



wf-JQ ttu'itmt www B, taten anni @time fte SYLVESTER HARNDEN, OF READING, MASSACHUSETTS. Leners Pawn No. 89,219, cmd April 20,1869.

IMPROVED CABINET-VENTILATOR.

The Schedule referred to in these Letters Patent and making part of the same.

To whom it may concern:

Be it known that I, SYLvEs'rERHARXDEN, of Reading, in the county of Middlesex, and State of Massachusetts, have invented an improved apparatus for Ventilating and purifying rooms, and that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings., in which- Figure 1 is a perspective view of my invention, showing outside.

Figure 2 is a vertical section of my apparatus.

Figure 3 is a transverse vertical section.

The object of my invent-ion is to produce a convenient, agreeable, and efticient means for Ventilating and purifying rooms, especially those occupied ,hy the sick, and my invention has been suggested by the inadequate means for the result sought, and by the wants of the sick, felt in personal experience and observation. And it has long been a subject of muchl concern and theorizing among medical men as to the best and most convenient means of purifying the air of a sick-room. The object sought is to remove`=the impurities from the air, and, at the same time, produce a healthful circulation of air, without the danger of cold culrents, and to secure a dry, bracing atmosphere, which cannot be done by chemical disintectants, often requiring counter-disinfectants.

Ihe nature of my invention consists in placing ice in such a position and manner, in the room, as to secure the proper circulation of air, and to receive the deposits of impure particles contained in the moisture,-

and in construct-ing a case, for this purpose, which shall be not only suitable for holding the necessary ice, but ornamental and useful in other directions,

Inthe drawings- A A represent a piece of furniture, like a secretary, the part A fitted with shelves and doors, like an ordinary book-case, the part A faced with imitation-drawers-m m.

In the top of the part A is an ice-receptacle, B, constructed on the principle of a refrigerator.

An aperture, fl, leads from this receptacle B up through the side of part A.

' At the opposite lower corner is an aperture, C. It is not essential that these= apertures should be precisely as shown, but one must be at the top and the other at the bottomof ybox B.

Below box B is space D, in which may be placed a pan or tank, to receive the water from the ice through aperture c. This aperture may as well be at one side, but it is more convenient to have it near the-centre, as shown.

The lidsH and H close the ice-receptacle B, and are finished to suit the whole case, H like a desk-lid, and H like a drawer, to match 'm fm.

H is a door to space D, and is finished like my,

No\vwhat is the operation of this apparatusI If there were no moisture in the air, there would be little impurity, and, as warmair contains more moisture than cold air, it follows if we can secure a cool and consequently dry air within a room, we rid it of impurities carried by warm, moist air; and, in a sick-room, this is highly essential. Impurities arise from the diseased body of the patient, and impregna-te the air. The cold air from the ice-receptacle B falls through aperture C into the room. A partial vacuum is created within B and aperture d, through which the warm moist air of the room rushes to supply the vacuumI and this current carries all impurities with it. The warm moist air is cooled and dried on the ice, andthe impurities are deposited upon the ice, so that the current passing out at C is puritied, cooled, and dried, and a fresh, bracing atmosphere, as curative as medicine, is given to the patient to breathe.

By the use of this means, a room may be kept as sweet and healthy as if all the doors and windows were opened, while the danger from draughts of air is avoided. These results are ascertained from repeated actual experiments and personal experience with the apparatus described during a recent summer-fever.

I construct these cases in a variety of forms and patterns other than with drawer-fronts, but after the same general construction shown. I sometimes construct the apparatus on legs, instead of in the form of a secretary.

I am aware that the principle on which my apparatus is based is not new, but has been covered by the Schooley patent for refrigerators, of which I am vonel of the principal owners.

What I claim as my invention, and desire to secure by Letters Patent, is-

An apparatus for Ventilating and purifying rooms, construct-ed as a secretary or book-case, and consisting of the ice-receptacle B, having apertures d, O, and c, substantially as shown and described.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

SYLVESTER HARNDEN.

Witnesses:

CARROLL D. WRIGHT, AUSTIN S. Howlvrn. 

